"Obsession" was the 47th episode of Star Trek: The Original Series.

References[edit | edit source]

Characters[edit | edit source]

Episode characters[edit | edit source]

BardoliChristine ChapelPavel ChekovDikironium cloud creatureStephen GarrovickBill HadleyJames T. KirkRyan LeslieLeonard McCoyRizzoMontgomery ScottSpockHikaru SuluSwensenNyota UhuraVinci (?)

Novelization characters[edit | edit source]

BardoliChristine ChapelDikironium cloud creatureDavid GarrovickJames T. KirkLeonard McCoyRizzoMontgomery ScottSpockSwensenNyota Uhura

Starships and vehicles[edit | edit source]

USS Enterprise (Constitution-class heavy cruiser)
Referenced only 
USS Farragut (Constitution-class heavy cruiser)

Locations[edit | edit source]

Argus XTycho IV

Races and cultures[edit | edit source]

HumanVulcanDikironium cloud creature

Science and classification[edit | edit source]

anatomylifeformlogicmattermemoryorbitquadrantraces and culturesspacestarstardatetechnologyuniverseweapon

Technology and weapons[edit | edit source]


Materials and substances[edit | edit source]


Lifeforms[edit | edit source]

humanoidDikironium cloud creature

States and organizations[edit | edit source]


Ranks and titles[edit | edit source]

captaincommandercommanding officercommunications officerFederation Starfleet ranksFederation Starfleet ranks (2260s)first officerlieutenant commanderofficerscientistscience officer

Other references[edit | edit source]

armbootclothingFederation membersfingerfive-year missiongovernmenthumanoidlanguagenation-statepantsrankStarfleet uniformStarfleet uniform (2260s)titletunicuniform

Appendices[edit | edit source]

Related media[edit | edit source]

Adaptations[edit | edit source]

Video releases[edit | edit source]

Background[edit | edit source]

According to actor Eddie Paskey, Lieutenant Leslie must have been "miraculously" revived in an unseen scene, which explains why he's seen again in future episodes, alive and well.[citation needed]

Images[edit | edit source]

Connections[edit | edit source]

Timeline[edit | edit source]

published order
Previous episode:
The Gamesters of Triskelion
TOS episode produced Next episode:
The Immunity Syndrome
Previous episode:
The Deadly Years
TOS episode aired Next episode:
Wolf in the Fold
Previous story:
That Which Survives
Star Trek 9
Next story:
The Return of the Archons
chronological order
Previous Adventure:
Beneath the Skin
pages 20-21
Memory Beta Chronology Next Adventure:
Treaty's Law
chapters 1-24
Previous Adventure:
The Gamesters of Triskelion
Pocket Next Adventure:
Treaty's Law
chapters 1-24
Previous Adventure:
The Gamesters of Triskelion
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
The Patrian Transgression

External links[edit | edit source]

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